Scooter uses a holographic double to divert the Renegades away from Dome 7.

After being glimpsed in part 1, the Last Engineer makes his full appearance in this episode. Numerous other Guardians and Renegades from the second wave of the toy line also make their debut in this chapter. Spike / Sky-Jack and Stallion makes their first broadcast AND chronological appearances. Other chronological debuts include:

Turbo blasts Crasher in such a manner that she falls forward into the Master Renegade and then turns at a 90 degree angle to fly out the airlock. It's like the "magic bullet", but with hand-blasters.

Small Foot didn't appear to be seriously injured by the Master Renegade, but she is suddenly under Rest Q's care with a mysterious injury that made her transforming circuitry disappear...allowing the audience to see the Modifier for the first time.

So after stumbling into a mysterious hidden chamber in the Moon of Knowledge and finding a clue to the Last Engineer's final fate, then going on a wild goose chase across the galaxy to Antares III, the Guardians find the Last Engineer after centuries when a stray Thruster blast creates a hole in the road, they fall in, and Scooter then crashes through a second hole, all completely at random. It's like slipping on a banana peel and finding Jimmy Hoffa under a table when you fall.